物理化学学报 >> 2011, Vol. 27 >> Issue (06): 1543-1550.doi: 10.3866/PKU.WHXB20110619

材料物理化学 上一篇    

纳米多级结构枣核型多孔氧化亚铜的合成及拉曼性质

孙都, 殷鹏刚, 郭林   

  1. 北京航空航天大学化学与环境学院, 北京 100191
  • 收稿日期:2011-03-04 修回日期:2011-04-11 发布日期:2011-05-31
  • 通讯作者: 郭林 E-mail:guolin@buaa.edu.cn
  • 基金资助:

    国家重点基础研究发展规划(973) (2010CB934700), 国家自然科学基金(50725208, 20973019)和高等学校博士学科点专项科研基金(20091102110035)资助项目

Synthesis and Raman Property of Porous Jujube-Like Cu2O Hierarchy Structure

SUN Du, YIN Peng-Gang, GUO Lin   

  1. School of Chemistry and Environment, Beijing University of Aeronautics & Astronautics, Beijing 100191, P. R. China
  • Received:2011-03-04 Revised:2011-04-11 Published:2011-05-31
  • Contact: GUO Lin E-mail:guolin@buaa.edu.cn
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2010CB934700), National Natural Science Foundation of China (50725208, 20973019), and Specialized Research Fund for the Doctoral Program of Higher Education, China (20091102110035).

摘要:

通过简单温和的水相还原反应, 在表面活性剂十二烷基苯磺酸钠(SDBS)的协同下合成了亚微米级枣核型多孔氧化亚铜纳米多级结构. 通过改变盐酸的加入量可以实现纳米粒子尺寸在300-900 nm范围可调. X射线衍射(XRD)和透射电子显微镜(TEM)分析表明, 亚微米粒子由小于10 nm的晶粒构成. 基于实验结果, 我们提出生长-刻蚀竞争生长模型来解释枣核型空心多孔结构的形成机制, 同时说明了尺寸调节机理. 利用激光拉曼光谱仪研究了样品的光学性质, 与相似尺寸的亚微米实心多面体的拉曼响应信号对比发现, 枣核型空心多孔结构的拉曼光谱表现出新颖的特性. 这些结果补充了氧化亚铜的拉曼光谱样本, 对文物表面颜料的无损拉曼检测具有一定的指导意义.

关键词: 纳米材料, 十二烷基苯磺酸钠, 氧化亚铜, 多级结构, 拉曼光谱

Abstract:

Structural engineering of nanocrystals is of great importance to control the properties of semiconductor oxides. Here, we present a mild wet chemical reduction route to obtain a sub-micron porous jujube-like Cu2O hierarchy structure. Sodium dodecylbenzene sulfonate (SDBS) is crucial in structural regulation and it acts as a soft template and a capping agent. The jujube-like particle consists of crystal grains less than 10 nm in size as verified by transmission electron microscopy (TEM) and X-ray diffraction (XRD). A set of time control experiments were carried out to study the evolution of the jujube-like structure. Interestingly, we found that altering the amount of added HCl resulted in a size-tuning effect of changing the size of the particles from approximately 300 to 900 nm. Based on these results, we propose a possible growth-etching competition mechanism to explain the formation of the hollow interior and its porous nature, which also agrees with the sizing-tuning effect. The optical properties were analyzed using Raman spectroscopy. By comparison with a conventional sub-micron solid polyhedral we found a novel Raman property for the porous jujube-like Cu2O. Our research complements the library of Cu2O Raman spectra, which is meaningful for the nondestructive examination of pigments on the surface of antiques by Raman techniques.

Key words: Nanomaterial, Sodium dodecylbenzene sulfonate, Cuprous oxide, Hierarchy structure, Raman spectroscopy

MSC2000: 

  • O648